Concerning DVDfab, which I did not know til now. A quick search on google: http://roundup.mplayerhq.hu/roundup/ffmpeg/issue382 I'd rather give money to the FSF to force these people to comply to the (L)GPL. It's ok if they charge 50 for this but they have to release the source code! Lame, really lame.
The lite version is free.
I use DVD43